A/N Welcome to my latest smut series! To be very, very clear: This is a high school student/teacher AU with D/s themes. If that bothers you, stop now. Caroline is 18 and Klaus is 26. It started after she was of age. This is going to be porn with plot, but this first chapter is pretty heavy on the porn. Also, I have no idea how this happened, but this story was inspired by Josh Groban's "The River." Every chapter title is a lyric. Heartfelt inspirational songs can lead to student/teacher porn, right? If you choose to read it, please let me know what you think!

Disclaimer: If you feel the need to leave me a blatantly transparent hate speech demanding to know why I, as a woman, would write such abusive filth, be advised that I moderate the comments. That sentiment also applies to claims that you alone speak for 7,000,000,000 people by informing me that, in spite of overwhelming evidence to the contrary, "no one" would want such a relationship. If your heavily underdeveloped ego forces you to cower behind a veil of digital anonymity in a manner akin to the Wizard of Oz, I will delete your vitriol as soon as my eyes stop rolling. Should you expect a response, please send me a copy of your current insurance card or payment information. I deal with rampant, unchecked mental illness for a living. If your insight rivals that of a garden gnome and you need me to explain to you, using small words, the process by which I invalidate your opinion before discarding it as laughable, I expect to be paid for services rendered. Also, should you require a detailed explanation as to why your projective identification is not going to result in my countertransference, I will charge double. If you are unwilling to properly compensate me for my time, I strongly suggest you save your energy for someone with greater emotional availability than that of a snow pea.

I Might Not Understand It

Caroline Forbes stormed into her history teacher's office, temper flaring as she slammed her latest essay down on his desk. Klaus Mikaelson shot her an unamused glare as the door slammed shut behind her. The eighteen-year-old honors student was never one to back down from a challenge, so his stone face did little to dampen her outrage. "You're blind if you can't see that paper was at least an A-."

"That mouth of yours is going to get you intro trouble one day, Caroline," Klaus chided, his tone only half-serious as his upper lip quirked in amusement.

The bright young blonde cocked her head to the side, one hand on her hip as she fought back a grin. "Oh yeah? How's that going to happen, Mr. Mikaelson?"

The teacher only briefly looked up from his laptop, but it was enough for her to see his eyes clouding with lust. "You're going down a dangerous path here, love."

"The only thing in danger is my GPA if you don't come to your senses," she sassed, crossing her arms over her chest in a huff. "That paper was solid. How could you give it a B?" He blinked at her; she stomped her foot. "My last three essays all got A's. This isn't fair."

Klaus shot her an amused smirk. "Life isn't fair."

"Clearly," she huffed, sitting down in front of his desk and crossing one leg over the other, her plaid skirt riding up to reveal her knee. "What can I do to improve my grade?" she asked in a demanding tone that set his teeth on edge. He would change that before she left his office.

"Work harder next time," he replied flatly. "Perhaps less time spent partying would allow more for your studies."

Caroline scoffed, rolling her eyes. "Please. My social life consists of me and 88 of my best friends."

"What you do at home is your business, sweetheart." Her jaw dropped at his offhanded tone. He smirked at her flabbergasted expression. "Although, I do hope you were referring to the keys on your piano."

"Afraid of the competition?" she countered, lip quirking up in a sly smile.

Klaus tilted his head to the side as he considered her. "Should I be?" Her smile widened as he held up a finger, beckoning her to him. She set down her bag by his desk and climbed onto his lap like she did everyday after school. He leaned forward to peck her on the lips, lightly pinching the flesh of her ass over her panties under her schoolgirl skirt. She looked up at him with pleading eyes, lip caught between her teeth. He pulled down her lower lip, voice growing stern. "Pouting will not improve your grades. You got a B because you deserved a B. Your grades aren't part of our arrangement."

Caroline groaned, shoulders deflating. His eyes fell to the top button of her white blouse, the edge of her lacy cream colored bra almost visible. "I know," she sighed unhappily. He unsnapped two of her buttons before her hand covered his, stopping him from reaching the third. "What can I do for extra credit?" she asked, eyes imploring him to give her something. "Seriously."

Klaus sighed, his hands falling to her hips. They'd been seeing each other for three months since one thing led to another after a heated debate about the American Revolution after hours in his office. She'd passionately argued that Hamilton was culturally significant enough to warrant playing in class. He'd disagreed, reminding her it was his classroom. She'd reminded him that it was her education and suggested he join the 21st century. He'd suggested she get on her knees and ask him nicely.

It shocked the hell out of him when she did.

Klaus had meant for her to beg figuratively, but when he saw her looking up at him from his office floor, he'd lost all sense of reason. She was a consenting adult and eight years wasn't that big a difference, right? Besides, he was sure it was going to be a one time thing. Three months later, he'd given up that crazy notion and spent most of his days counting the minutes until 3:20 when she would come to his office in her white button-down blouse and plaid skirt and get on her knees for him all over again. They never did watch the famed musical, but he gave her an A for effort… and a sharp slap on the ass and order to return the next day if she was interested.

Caroline Forbes was very interested.

The 26-year-old looked her over appraisingly, eyes flicking up and down her curves as he thought about it. "Bring me a thousand words on the election of 1800 by the end of the week. Focus on the cultural significance of the transfer of power and its implications in modern day society."

"So, everything that's not happening with the evil cheeto presidency?" she quipped lightly.

"Cheeky," he teased, pinching a nipple hard enough to make her jump. "Write it as well as you did your last three essays and I will consider adding an additional five points to your last assignment. That's my best offer and it's non-negotiable. Understood?"

Caroline threw her arms around his neck and hugged him tightly. "Thank you, Mr. Mikaelson!"

Klaus used the opportunity to nip lightly on her neck, slapping her lightly on the ass. "You're welcome, love." He wound his fingers firmly in her golden curls and pulled her off his shoulders, eyes meeting hers as electricity crackled between them. "Now, get on your knees and thank me properly."

The blonde flashed him a coy smile on her way down as he pushed her to the ground. "Yes Sir," she teased, fluttering her eyelashes as she unbuckled his belt.

"Good girl," he praised, tucking a stray tendril behind her ear. He caressed her cheek fondly before barking in his teacher's voice, "Open your mouth and suck my cock, you overachieving little slut." She felt her core clench at his harsh words and wasted no time wrapping her lips around his head and swirling her tongue around. She moaned at the sweet and salty taste of his precum. "Take you top off." Her hands flew to her buttons and deftly unsnapped them, tossing her uniform shirt behind her. Her bra followed quickly behind, leaving her breasts bare, nipples pebbled in the cool air. It was December in Mystic Falls, Virginia, and while the heater was on, the cold outside somehow seeped inside her teacher's office.

Noticing her shiver, Klaus smirked as she sucked up and down, hollowing her cheeks the way she'd learned he liked a lot. He picked up a ruler and used it to tease her nipples one by one, making her groan and send vibrations through his shaft. "If you're cold, I can suggest something to warm you up," he said mischievously, eyes darkening at the excitement he saw in her sapphire irises as she nodded her head. He bucked his hips up into her mouth, making her gag a little bit as she struggled to keep up. "Do a good job and you might earn it," he teased, tugging sharply at her curls to urge her on. She took his words to heart, wrapping her hand around the base of his cock and moving in time with her lips as she sucked hard and fast, taking him all the way to the back of her throat. She cupped his balls, tugging lightly, and he came undone. He quickly pulled out, coating her lips and breasts with his come. "Leave it," he panted, letting go of her hair as he fought to catch his breath. "Let it dry as a reminder of how eager you were to please me."

"Yes, Mr. Mikaelson," she replied obediently, placing her hands flat on her thighs and waiting for his next order. Caroline was loud, outspoken and fought him on just about everything in class. Behind closed doors, it was a different story. She let him call her every filthy name under the sun and thanked him for doing it, growing wetter every time they played. Sometimes, he'd send her a heated gaze in class and it was enough to make her forget what she'd been arguing. Of course, two could play at that game. She'd casually unbutton the top button of her shirt and wait for him to notice. It sent him reeling every time.

The first time she'd tried that in class, he'd thought it would be fun to punish her with a spanking. He learned very, very quickly that that was no punishment at all. It did nothing but make her beg harder for his cock. Orgasm denial was his favorite game now, oral sex the ultimate reward. She'd do just about anything to come, including many deliciously degrading things that made him chuckle before inevitably giving in. They had a strange dynamic, but it worked for them. They knew each other's every kink, but that's where it ended.

Caroline was very much a mystery to her history teacher. Klaus knew she was a fantastic pianist, a real protege. Her sights were set on Julliard. He believed her when she said her social life consisted of her instrument. The vivacious blonde was a chronic overachiever; she cried when she got a B on anything. The upside of that was her absolute perfectionism when it came to pleasing him. She never backed down from a challenge, no matter how much her face burned in shame at how much she enjoyed their illicit activities. The minutes from 3:20 to 4:00 were the best part of her day. After that, she retreated to the music rooms to practice until her fingers bled while he went home to an empty house.

Klaus had several siblings, but none who lived nearby, and his parents were long gone. He was married to his career; Caroline was just his mistress. They had an eight-year age gap, which led to a power exchange that came naturally. His cock hardened when she called him "Sir." It made her rub her thighs together in ecstatic agony every time his eyes darkened with lust at the epithet. She made the mistake of calling him that once in class. He'd spent the rest of the hour sitting behind his desk and hadn't let her come for a week.

As he sat in his office chair watching his come dry on her breasts, he debated how much he wanted to fuck with her that day. She'd barged into his office to yell at him about her grades; he couldn't let that go without at least making her suffer a little bit. "You were very rude to me, you know," he finally taunted in faux admonishment.

Caroline hung her head momentarily before looking up at him from beneath long lashes. "I'm sorry, Mr. Mikaelson." He just glared at her sternly the way he did when students spoke out of turn; it made her arousal drip down her inner thighs. "Will you please let me make it up to you?"

Klaus smirked, picking up the ruler and rubbing it over his palm. "I should bend you over my desk, spank you and then leave you wet and hungry for an orgasm I won't give you."

The senior sucked in a deep breath at his harsh words, knowing he might actually do it. "Whatever pleases you, Sir," she replied in a breathy whisper, embarrassed by how much her body was already responding to his threats. He cocked his head at the desk. She immediately rose to her feet, wobbling a little bit as the blood rushed back to her shins. He put a hand on her lower back to steady her as she bent over, resting her head on her hands. He flipped up her skirt and then dropped to his knees, slowly rolling her lacy panties down her legs and helping her step out of them before casting them aside.

Standing up, the teacher ran the wooden ruler over her porcelain cheeks, feeling his cock come back to life already. "I'd give you a number, but we both know you'd lose count. I'll stop when your ass is painted bright red from my strikes. If you're a very good girl, I might let you beg me to fuck you." She tried to covertly rub her thighs together to gain any kind of friction, but he noticed it immediately. "Spread your legs, you fuck hungry little whore." She did, her face flushing as she realized how right he was. Her pussy was already on fire and he hadn't even touched her yet.

"Such a wanton slut, spreading your legs so wide for your teacher." He tutted playfully as he delivered the first strike, making her flinch in surprise. "And you love every second of it; don't you?"

"Yes, Mr. Mikaelson," she moaned after a few more strikes.

Klaus took his time artfully building her up as he painted her skin red with the ruler. He set it on her lower back and spoke in a warning tone. "If it falls, I'll start over." She nodded her head, burying her face in her hands as he circled her dripping entrance with a single finger. "Look how wet you are from that. Do you like it when I hurt you?"

"Yes, Sir. I love it," she panted when he entered her, voice slightly strained.

The teacher smirked as her arousal dripping down his hand when he pushed two fingers inside her, curving them to massage her inner walls. He used his free hand to caress the warm skin of her ass, pinching her here and there to try and make her flinch enough to let the ruler fall. She stifled a loud moan with her arms as he began to pick up the pace. She felt the familiar coil in her lower belly; her panting grew heavier. He waited until he knew she wasn't expecting it to slap her hard enough to make her jump. The wooden stick clattered to the linoleum, making her suck in a harsh breath.

"Now look at what you've done, you naughty girl," he admonished in a tone that sounded more playful that irritated.

"I'm sorry, Mr. Mikaelson," she said in a breathy whisper, mourning the loss of his fingers as he withdrew them to pick up the ruler. "Please forgive me."

"Oh, you'll have to earn that, love." She could hear the arrogant smirk plastered beneath his gruff stubble; it made her lower belly ache.

Caroline gasped when the ruler lightly slapped her engorged clit. "Please!" she choked out, desperate for more attention where she needed it.

"No," he replied simply, smacking her hard across the ass, leaving a bright stripe in his wake. He moved on to her thighs, his cock straining against the rich fabric of his trousers. He continued working her over, hitting her from all different angles until she was squirming against the desk, her breathing ragged. He toed her feet further apart, eyeing her slick folds. "Look at you, bent over my desk with your ass painted red from my strikes, just desperate for my cock. Do you want me to fuck your tight little pussy, my little slut?"

"Yes, Mr. Mikaelson," she whined, whimpering pitifully as he used the tip of the ruler to tease her tight bundle of nerves, slapping it lightly over and over. "Please…"

"Tell me what you want," he barked in his teacher's tone. "Specifically."

Caroline wasted no time obeying. "I want you to please fuck me with your cock however it pleases you. Use me like your little fuck toy. I want to hear your balls slapping against me as I beg for you. Please let me come, Mr. Mikaelson. I'll do anything you want. Please."

Klaus released a long-suffering sigh, as though it pained him to do this. She heard the tell-tale clink of his belt; it sent a jolt of electricity straight through to her core. "I suppose you've made up for your earlier outburst," he mused, teasing her folds with his dripping head. He'd practically demanded she get an IUD a few weeks after their first time, and as he stood there slicking his tip with her juices, he was eagerly anticipating the sight of his come running down her legs. "I'm going to fuck you until I come and let it dry on your thighs as a reminder of how you disrespected me."

"Yes, Sir. I'm very sorry. Do whatever pleases you; just please make me come." She mewled in utter contentment as he pushed inside of her, filling her completely. "Thank you," she whispered, knowing how much he liked that. She gasped as he stroked her sore ass with his hand, occasionally lightly slapping her to make her wriggle beneath him.

Klaus slowly picked up speed, his nails digging into her hip to bring her closer to him with each thrust, half-moons imprinting on her soft skin. "Fuck, you're so fucking tight today, love. I love the way your pussy feels against my cock. You may not get to come at this rate."

"Mr. Mikaelson, please…"

"Please what?"

"Please play with my clit and fuck me hard and fast," she spat out obediently, silently praying that he wouldn't leave her hanging. He had before and then forbid her to touch herself for the entire weekend, relenting only when she cried for him Monday afternoon.

The educator put both of his hands on her hips, grinding against her. He looked down to see his cock moving in and out of her; it was mesmerizing. She was easily the hottest girl in the school, but she'd never had much of a dating life, save a loser named Tyler the previous grading period. Klaus failed him on purpose for cheating on her with a no-name slut from the bayou, costing him his football scholarship to Yale. And that was before Klaus was fucking her. There was just something about the sunshine blonde that drew him in. He'd only been at the school since the beginning of August, but he'd noticed her immediately. Even as he slammed into her, he couldn't get enough. She was the drug he couldn't turn down, the high he would always chase.

"Ride my cock, love," he commanded as he stared at their flesh pounding against each other, his balls slapping against her ass. "Show me how much you want it." She wasted no time rapidly picking up the pace. He stood completely still as she bucked her hips against his, chasing her release. He bent over and circled an arm around her to play with her clit, rubbing it up and down with two fingers. "Do you want to come, my cock hungry little whore?"

"Yes, Mr. Mikaelson, please," she begged, the sore skin of her ass sending delicious ripples of pain straight through to her core with every rugged thrust of his shaft.

Klaus gripped her tightly with one hand, the other playing with her rosy bud. He bit down hard on her neck when he felt her about to topple over the edge before whispering harshly in her ear, "Come for me, slut. Come for your teacher like a good little girl."

Caroline bit down on her arm to muffle the sound of her scream as a powerful orgasm crashed over her. The older man pounded into her, furiously rubbing her clit to help her ride out wave after wave of pleasure. He managed to hold on until he felt her coming back down before spilling his seed inside of her. He collapsed on top of her in a heap, chest heaving. He looked up at the clock, short, spiky, sweaty blond locks curling behind his ears, and saw that it was 3:55 PM. They had five minutes left before his open office hours began.

The teacher patted her lightly on her red ass, smirking as he saw his release clinging to her inner thighs. "Clean me up, sweetheart," he commanded softly, tugging a curl affectionately. Nodding her head, she fell wordlessly to her knees. She ran her tongue up and down his shaft, sucking their combined juices off his cock until he tapped her on the shoulder. "Good girl," he praised, offering her a hand. She wobbled as she got to her feet and he grabbed her elbow to steady her. He leaned down to lightly kiss her on her strawberry lips, his tongue barely flickering over hers before he pulled back. "You did very well today. I'm very pleased."

Caroline beamed up at him. "Thank you for letting me come, Mr. Mikaelson."

Klaus wrapped his arms around her, eyeing the clock to see that they had two minutes left. He pecked her on top of her golden curls, resting his stubbly chin against her head and wishing they had more time. "You're welcome, sweetheart." He ran his palms up and down the smooth skin of her bare back for a minute before grabbing her bra off the floor and handing it to her. She quickly put it on and wiggled into her panties as he held up her shirt. She slipped it on and he reached around from behind her to do up the buttons, tweaking her nipples just enough to make her groan at the sudden pain. He spun her around and kissed her one last time. "Same time tomorrow?" he asked with a dimpled smile.

The sunshine blonde winked at him. "If if pleases you, Mr. Mikaelson." He smirked, patting her on the ass as she walked away. He may end up getting fired, but he'd go out smiling.

A/N Please let me know what you thought!